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US 2011/0300430 A1Published application
Separator for battery, and non-aqueous lithium battery
AssigneesMitsubishi Chemical Corporation, Mitsubishi Plastics, Inc.
InventorsYasushi Usami, Takeyoshi Yamada, Eiki Yasukawa, Takayuki Nakajima
Life of this patent
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Abstract
Disclosed is a separator for a battery, which comprises a porous film mainly composed of a polyolefin film, has heat resistance, and can improve battery properties. Specifically disclosed is a separator for a battery, which is characterized by having a layer mainly composed of a polyolefin resin, wherein at least one surface of the separator has an arithmetic average roughness (Ra) of 0.3 μm or more.
Claims14
1-13. (canceled)
A separator, comprising a porous layer comprising a polypropylene resin as a main component thereof,
- wherein an arithmetic average roughness Ra of at least one surface of the separator is set to not less than 0.3 μm,
- wherein the separator is suitable for a battery.
Dependencies are inferred from the claim text.